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<BODY><H2><a href="../contents.htm">Tcl8.6.11/Tk8.6.11 Documentation</a> <small>&gt;</small> <a href="contents.htm">Tcl Commands</a> <small>&gt;</small> rename</H2>
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<H3><A NAME="M2">NAME</A></H3>
rename &mdash; Rename or delete a command
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>rename </B><I>oldName newName</I><BR>
<H3><A NAME="M4">DESCRIPTION</A></H3>
Rename the command that used to be called <I>oldName</I> so that it
is now called <I>newName</I>.
If <I>newName</I> is an empty string then <I>oldName</I> is deleted.
<I>oldName</I> and <I>newName</I> may include namespace qualifiers
(names of containing namespaces).
If a command is renamed into a different namespace,
future invocations of it will execute in the new namespace.
The <B>rename</B> command returns an empty string as result.
<H3><A NAME="M5">EXAMPLE</A></H3>
The <B>rename</B> command can be used to wrap the standard Tcl commands
with your own monitoring machinery.  For example, you might wish to
count how often the <B><A HREF="../TclCmd/source.htm">source</A></B> command is called:
<P>
<PRE><B>rename</B> ::source ::theRealSource
set sourceCount 0
proc ::source args {
    global sourceCount
    puts &quot;called source for the [incr sourceCount]'th time&quot;
    uplevel 1 ::theRealSource $args
}</PRE>
<H3><A NAME="M6">SEE ALSO</A></H3>
<B><A HREF="../TclCmd/namespace.htm">namespace</A></B>, <B><A HREF="../TclCmd/proc.htm">proc</A></B>
<H3><A NAME="M7">KEYWORDS</A></H3>
<A href="../Keywords/C.htm#command">command</A>, <A href="../Keywords/D.htm#delete">delete</A>, <A href="../Keywords/N.htm#namespace">namespace</A>, <A href="../Keywords/R.htm#rename">rename</A>
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